Heating body and preparation method therefor, vaporizer, and electronic device

ABSTRACT

A heating body includes: a porous ceramic body having a preheating member, the preheating member including a porous infrared ceramic structure; and a heating member located on the porous ceramic body, the heating member providing heat for the preheating member and vaporizing preheated liquid. In an embodiment, the porous ceramic body includes a substrate. The preheating member is located on the substrate. The substrate includes a porous ceramic structure. The heating member is completely located in the preheating member and is close to the substrate, or is located at a junction of the substrate and the preheating member.

CROSS-REFERENCE TO PRIOR APPLICATION

This application is a continuation of International Patent ApplicationNo. PCT/CN2021/134818, filed on Dec. 1, 2021, which claims priority toChinese Patent Application No. 202011595814.6, filed on Dec. 29, 2020.The entire disclosure of both applications is hereby incorporated byreference herein.

FIELD

This application relates to the field of vaporizer technologies, and inparticular, to a heating body and a preparation method therefor, avaporizer, and an electronic device.

BACKGROUND

An electronic vaporizer mainly includes a vaporizer and a battery. Thevaporizer is an important component of the electronic vaporizer, whichis configured to vaporize a vaporization medium for inhalation. In thevaporizer, a heating body is a core component of the vaporizer thatperforms a vaporization function, which is mainly formed bypre-embedding a heating wire or screen printing a heating film on aceramic substrate. The heating body in which the heating wire ispre-embedded has advantages such as a simple structure, highvaporization efficiency, and a uniform temperature field. The heatingbody on which the heating film is screen printed has advantages such asa large heating area, being capable of implementing surfacevaporization, and high thermal efficiency.

However, when vaporizing the vaporization medium, the two types ofheating bodies are prone to problems such as slow formation of anaerosol, and generation of a burnt flavor, miscellaneous air, or thelike due to dry heating of the heating body, affecting a userexperience.

SUMMARY

In an embodiment, the present invention provides a heating body,comprising: a porous ceramic body comprising a preheating member, thepreheating member comprising a porous infrared ceramic structure; and aheating member located on the porous ceramic body, the heating memberbeing configured to provide heat for the preheating member and tovaporize preheated liquid.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in evengreater detail below based on the exemplary figures. All featuresdescribed and/or illustrated herein can be used alone or combined indifferent combinations. The features and advantages of variousembodiments will become apparent by reading the following detaileddescription with reference to the attached drawings, which illustratethe following:

FIG. 1 is a schematic structural diagram of a heating body according toan embodiment.

FIG. 2 is an exploded view of the heating body shown in FIG. 1 .

FIG. 3 is a cross-sectional view of the heating body shown in FIG. 1 .

FIG. 4 is a flowchart of a method for preparing a heating body accordingto an embodiment.

DETAILED DESCRIPTION

In an embodiment, the present invention provides a heating body and apreparation method therefor, a vaporizer, and an electronic device.

In an embodiment, the present invention provides a heating body,including:

a porous ceramic body, including a preheating member configured topreheat liquid, where the preheating member is a porous infrared ceramicstructure; and

a heating member, where the heating member is located on the porousceramic body, and is configured to provide heat for the preheatingmember and vaporize preheated liquid.

In the heating body, a porous infrared ceramic structure is used as apreheating member. The preheating member preheats liquid by using heatprovided by the heating member to radiate far infrared rays, therebyreducing viscosity of the liquid and improving fluidity of the liquid inthe porous ceramic body. In this way, the to-be-vaporized liquid mayreach the heating member more quickly and be vaporized, therebyimproving a problem that when a vaporization medium is vaporized, anaerosol is prone to slow formation. In addition, because the fluidity ofthe to-be-vaporized liquid in the porous ceramic body is improved, theto-be-vaporized liquid may reach the heating member more quickly, and aproblem that the heating body is prone to dry heating is also improved.

In an embodiment, the porous ceramic body further includes a substrate,the preheating member is located on the substrate, the substrate is aporous ceramic structure, and the heating member is completely locatedin the preheating member and is close to the substrate or is located ata junction of the substrate and the preheating member.

In an embodiment, the substrate is a hollow porous ceramic structure,the preheating member is a hollow porous infrared ceramic structure, andthe substrate and the preheating member are nested with each other.

In an embodiment, the preheating member is sleeved on the substrate, andthe heating member is spirally distributed on the substrate.

In an embodiment, the heating member includes a heating portion and aninfrared heating layer located on the heating portion.

In an embodiment, a thickness of the infrared heating layer ranges from20 μm to 500 μm.

In an embodiment, the substrate is in a shape of a hollow cylinder, thepreheating member is in a shape of a hollow cylinder, the preheatingmember is sleeved on the substrate, an inner diameter of the substrateranges from 5 mm to 3 mm, and an outer diameter of the preheating memberranges from 2.5 mm to 9 mm.

In an embodiment, a surface of the substrate close to the preheatingmember recesses to form a first groove, a surface of the preheatingmember close to the substrate recesses to form a second groovecorresponding to the first groove, the first groove and the secondgroove form a heating cavity, and the heating member is accommodated inthe heating cavity.

In an embodiment, a porosity of the preheating member ranges from 30% to80%.

In an embodiment, a median pore size of the preheating member rangesfrom 10 μm to 100 μm. In an embodiment, a radiation wavelength of thepreheating member ranges from 5 m to 20 μm.

In an embodiment, a preheating temperature of the preheating memberranges from 40° C. to 90° C. In an embodiment, a resistance value of theheating member ranges from 0.5Ω to 5Ω.

In an embodiment, a porosity of the substrate ranges from 30% to 80%.

In an embodiment, a median pore size of the substrate ranges from 10 μmto 100 μm.

A method for preparing the heating body is provided, including:

integrally forming, according to a preset shape, the heating member anda raw material configured to prepare the porous ceramic body to preparea green body; and

sintering the green body after degumming to prepare the heating body. Avaporizer is provided, including:

a liquid storage cavity, configured to store liquid; and

a heating body, configured to absorb liquid in the liquid storage cavityand vaporize the liquid, where the heating body is the foregoing heatingbody.

An electronic device is provided, including a power supply and thevaporizer, where the power supply is electrically connected to thevaporizer to supply power to the vaporizer.

For ease of understanding this application, this application isdescribed more comprehensively below. This application may beimplemented in many different forms, and is not limited to embodimentsdescribed in this specification. On the contrary, the embodiments areprovided to make the disclosed content of this application clearer andmore comprehensive.

It should be noted that, when a component is expressed as “being fixedto” another component, the component may be directly on the anothercomponent, or one or more intermediate components may exist between thecomponent and the another component. When one component is expressed as“being connected to” another component, the component may be directlyconnected to the another component, or one or more intermediatecomponents may exist between the component and the another component.Orientation or position relationships indicated by terms such as“vertical”, “horizontal”, “left”, “right”, “upper”, “lower”, “inner”,“outer”, and “bottom” are based on orientation or position relationshipsshown in the accompanying drawings, and are used only for ease ofdescription, rather than indicating or implying that the mentionedapparatus or component needs to have a particular orientation or needsto be constructed and operated in a particular orientation. Therefore,such terms should not be construed as a limitation to this application.In addition, terms “first” and “second” are only used to describe theobjective and cannot be understood as indicating or implying relativeimportance.

Unless otherwise defined, meanings of all technical and scientific termsused in this specification are the same as those usually understood by aperson skilled in the art to which this application belongs. In thisapplication, terms used in the specification of this application aremerely intended to describe objectives of specific embodiments, but arenot intended to limit this application.

An implementation of this application provides a vaporizer. Thevaporizer includes a liquid storage cavity and a heating body 10. Theliquid storage cavity is configured to store liquid, such as avaporization medium, and the heating body 10 is configured to absorbliquid in the liquid storage cavity and vaporize the liquid. In someembodiments, the liquid storage cavity has a liquid outlet, and theheating body 10 is close to the liquid outlet. The liquid in the liquidstorage cavity flows out from the liquid outlet and enters the heatingbody 10, so as to be vaporized. In a specific example, the vaporizer isan electronic vaporizer.

Referring to FIG. 1 to FIG. 3 , the heating body 10 includes a porousceramic body 110 and a heating member 120 located on the porous ceramicbody 110. The porous ceramic body 110 includes a substrate 111 and apreheating member 112 located on the substrate 111. Specifically, theporous ceramic body 110 has a liquid inlet surface 113. The liquid inthe liquid storage cavity flows out through the liquid outlet and entersthe porous ceramic body 110 from the liquid inlet surface 113.

In some embodiments, the substrate 111 is a porous ceramic structure andhas a liquid guiding function. In some other embodiments, the substrate111 is a hollow porous ceramic structure. In the embodiment shown in thefigure, the substrate 111 is in a shape of a hollow cylinder. Certainly,in another embodiment, a shape of the substrate 111 is not limited tothe hollow cylinder, and may further be another hollow structure.

In this implementation, a porosity of the substrate 111 ranges from 30%to 80%, and a median pore size of a pore of the substrate 111 rangesfrom 10 μm to 100 μm. The porosity of the substrate 111 and a pore sizeof the pore are set as described above, which is convenient for thesubstrate 111 to absorb the liquid. In some embodiments, the porosity ofthe substrate 111 is 30%, 40%, 50%, 60%, 70%, or 80%. The median poresize of the pore of the substrate 111 is 10 μm, 20 μm, 30 μm, 40 μm, 50μm, 60 μm, 70 μm, 80 am, 90 am, or 100 am. In some other embodiments, aporosity of the substrate 111 ranges from 40% to 70%, and a median poresize of a pore of the substrate 111 ranges from 10 μm to 80 am. It maybe understood that, in other implementations, the porosity of thesubstrate 111 and the pore size of the pore are not limited to theabove, and may be adjusted according to actual needs.

The preheating member 112 is close to the liquid outlet and is locatedon the substrate 111. The preheating member 112 is a porous infraredceramic structure and has a function of guiding liquid and radiatinginfrared rays. The preheating member 112 has a liquid inlet surface 113,and the liquid enters the preheating member 112 through the liquid inletsurface 113 of the preheating member 112 after flowing out from theliquid storage cavity. When flowing through the preheating member 112,the liquid is preheated by the infrared rays radiated by the preheatingmember 112, so that viscosity is reduced and fluidity is improved. Inthis way, when the heating body 10 vaporizes the vaporization medium, acase of slow formation of an aerosol and dry heating due to the poorfluidity of the vaporization medium in the porous ceramic body 110 isnot prone to occur.

In some embodiments, both the preheating member 112 and the substrate111 are hollow structures, and the preheating member 112 is sleeved onthe substrate 111. When the preheating member 112 is sleeved on thesubstrate 111, an outer circumferential surface of the preheating member112 is the liquid inlet surface 113. The liquid flows out from theliquid storage cavity, enters the preheating member 112 through theouter circumferential surface of the preheating member 112, and isvaporized into an aerosol after being preheated by the preheating member112 and is heated by the heating member 120, and is discharged from aninner circumferential surface of the substrate 111. It may be understoodthat, the preheating member 112 may also be nested in the substrate 111.That is, the substrate 111 is sleeved on the preheating member 112. Inthis case, the preheating member 112 is accommodated in a hollow portionof the substrate 111, an inner circumferential surface of the preheatingmember 112 is the liquid inlet surface 113. The liquid flows out fromthe liquid storage cavity, enters the preheating member 112 through theinner circumferential surface of the preheating member 112, and isvaporized into an aerosol after being preheated by the preheating member112 and is heated by the heating member 120, and is discharged from theouter circumferential surface of the substrate 111.

In the embodiment shown in the figure, the preheating member 112 is in ashape of a hollow cylinder. In a specific example, the substrate 111 isin a shape of a hollow cylinder, the preheating member 112 is in a shapeof a hollow cylinder, the preheating member 112 is sleeved on thesubstrate 111, an inner diameter of the substrate 111 ranges from 1.5 mmto 3 mm, and an outer diameter of the preheating member ranges from 2.5mm to 9 mm. It may be understood that, a size of the substrate 111 isnot limited to the above, and a size of the preheating member 112 is notlimited to the above, and may further be adjusted according to an actualsituation, provided that the shape and size of the preheating member 112may match that of the substrate 111 and the liquid outlet.

In some embodiments, at least one of the substrate 111 or the preheatingmember 112 may be a non-hollow structure. When the substrate 111 is thenon-hollow structure, the preheating member 112 is the hollow structure.In this case, the preheating member 112 is located on one side of asurface of the substrate 111, and the to-be-vaporized liquid isvaporized after being preheated by the preheating member 112, and isthen discharged from the other side of the substrate 111. When thesubstrate 111 is a hollow structure, the preheating member 112 may bethe non-hollow structure. In this case, the preheating member 112 may belocated on the substrate 111 in a stacking manner.

In this implementation, a porosity of the preheating member 112 rangesfrom 30% to 80%, and a median pore size of a pore of the preheatingmember 112 ranges from 10 μm to 100 μm. The porosity of the preheatingmember 112 and a pore size of the pore are set as described above, whichis convenient for the substrate 111 to absorb the liquid. In someembodiments, the porosity of the preheating member 112 is 30%, 40%, 50%,60%, 70%, or 80%. The median pore size of the pore of the preheatingmember 112 is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 am, 90am, or 100 μm. In some other embodiments, a porosity of the preheatingmember 112 ranges from 40% to 70%, and a median pore size of a pore ofthe preheating member 112 ranges from 20 μm to 80 μm. It may beunderstood that, in other implementations, the porosity of thepreheating member 112 and the pore size of the pore are not limited tothe above, and may be adjusted according to actual needs.

When far infrared rays irradiate on a heated object, a part of the raysare reflected back, and a part of the rays are absorbed by the object.When an emitted far infrared wavelength is consistent with an absorptionwavelength of the heated object, the heated object absorbs the farinfrared rays. In this case, molecules and atoms in the object“resonate”-producing strong vibrations and rotations, and the vibrationsand rotations increase a temperature of the object, achieving theobjective of heating the object. Therefore, a wavelength radiated fromthe preheating member 112 may be selected according to a heatedsubstance. In this embodiment, the heated substance is an oilvaporization medium, and a radiation wavelength of the preheating member112 ranges from 5 μm to 20 μm. The radiation wavelength of thepreheating member 112 is set to range from 5 μm to 20 μm, effectivecomponents (such as essence, glycerin, nicotine, or the like) in the oilvaporization medium may be heated precisely, thereby implementingprecise vaporization, and increasing an effective vaporizationconcentration of the effective components. Certainly, the radiationwavelength of the preheating member 112 is not limited to the above, andmay further be other radiation wavelengths, provided that the radiationwavelength of the preheating member 112 may match the absorptionwavelength of the heated object.

In an embodiment, the preheating member 112 is a porous infrared ceramicstructure at a room temperature. The room temperature ranges from 25° C.to 150° C. In this implementation, a preheating temperature of thepreheating member 112 ranges from 40° C. to 90° C.

The preheating temperature refers to a temperature that the liquidpreheated by the preheating member 112 may reach. The temperature issuitable for preheating an oil vaporization medium of an electronicvaporizer. Certainly, when the vaporized liquid is not the oilvaporization medium but other liquid, the preheating temperature of thepreheating member 112 may be adjusted according to liquid thatspecifically needs to be vaporized.

The heating member 120 is configured to provide heat for the preheatingmember 112 and vaporize preheated liquid. A part of heat released by theheating member 120 directly heats the liquid to cause the liquid to bevaporized, and the other part is conducted to the preheating member 112to cause the preheating member 112 to absorb the heat and radiateinfrared rays.

In some embodiments, the heating member 120 is located in the porousceramic body 110 and is configured to generate heat. In the embodimentshown in the figure, the heating member 120 is located at a junctionbetween the substrate 111 and the preheating member 112. The heatingmember 120 is arranged at the junction between the substrate 111 and thepreheating member 112, so that the heat generated by the heating member120 is fully used, and preheating and vaporization are simultaneouslysatisfied. Specifically, a surface of the substrate 111 close to thepreheating member 112 recesses to form a first groove 114, a surface ofthe preheating member 112 close to the substrate 111 recesses to form asecond groove 115 corresponding to the first groove 114, the firstgroove 114 and the second groove 115 form a heating cavity, and theheating member 120 is accommodated in the heating cavity.

In other implementations, the heating member 120 may be completelyembedded in the preheating member 112, and may also be completelyembedded in the substrate 111. For example, the heating member 120 iscompletely located in the preheating member 112 and is away from theliquid outlet; or the heating member 120 is completely located in thesubstrate 111 and is close to the preheating member 112.

For example, in an implementation shown in the figure, the heatingmember 120 is spirally distributed on the substrate 111. Certainly, insome other embodiments, the shape of the heating member 120 is notlimited to a shape of a spiral, and may further be another shape. Forexample, at least one of a shape of a sheet, a strip, an S, or a U.

In an embodiment, the heating member 120 includes a heating portion 121.Optionally, the heating portion 121 is the heating wire. Optionally, ina specific example, the heating portion 121 is a piece of heating wire(that is, monofilament). In this implementation, a resistance value ofthe heating portion 121 ranges from 0.5Ω to 1.5Ω. In another embodiment,a resistance value of the heating portion 121 ranges from 0.8Ω to 1.3Ω.

In some embodiments, the heating member 120 further includes an infraredheating layer on the heating portion 121. The infrared heating layer isarranged on the heating portion 121, to cause the heat utilization ofthe heating portion 121 to be higher. In this way, the preheating member112 receives more heat that are more uniform, and preheating is faster.In this implementation, a thickness of the infrared heating layer rangesfrom 20 μm to 500 μm. In another embodiment, a thickness of the infraredheating layer ranges from 20 μm to 80 km.

In some embodiments, the substrate 111 may be omitted. When thesubstrate 111 is omitted, the heating member 120 may be located in thepreheating member 112 and be away from the liquid outlet, so that theliquid is first preheated and then vaporized. In this case, the heatingmember 120 transfers heat energy to the preheating member 112 and causesthe preheating member 112 to radiate heat energy to preheat the liquid.The preheated liquid flows through the heating member 120 and isvaporized, thereby releasing the aerosol. Certainly, when the substrate111 is omitted, the heating member 120 may also be located on an outersurface of the preheating member 112, provided that the heating member120 may provide heat for the preheating member 112 to preheat thevaporization medium and vaporize the vaporization medium. In anembodiment, the preheating member 112 is a non-hollow structure, a sideof the preheating member 112 is close to the liquid outlet, and theheating member 120 is located on a surface of the preheating member 112and is away from a side of the liquid outlet. In this case, the liquidflowing out from the liquid outlet enters the preheating member 112 at aposition close to the liquid outlet, is first preheated by thepreheating member 112, and is then vaporized by the heating member 120on the surface of the preheating member 112, and is released. In anotherembodiment, the preheating member 112 is a hollow structure, and theheating member 120 is located on the outer circumferential surface ofthe preheating member 112. In this case, after flowing out from theliquid outlet, the liquid enters the preheating member 112 through theinner circumferential surface of the preheating member 112, and is firstpreheated by the preheating member 112 and is then heated by the heatingmember, thereby releasing the aerosol from the outer circumferentialsurface of the preheating member 112.

In some embodiments, the heating member 120 may further be located onthe surface of the porous ceramic body 110. For example, when thesubstrate 111 is omitted, the heating member 120 is located on the outersurface of the preheating member 112.

Certainly, the heating body 10 further includes a connecting member 130.The connecting member 130 is configured to electrically connect theheating member 120 to a power supply. For example, in an implementationshown in the figure, the connecting member 130 passes through the outercircumferential surface of the preheating member 112.

The heating body 10 includes a porous ceramic body 110 and a heatingmember 120 located on the porous ceramic body 110, which at least hasthe following advantages:

-   -   (1) A part of heat provided by the heating member 120 may cause        the preheating member 112 to be heated and radiate infrared        rays, thereby preheating the vaporization medium. In this way,        viscosity of the vaporization medium after entering the porous        ceramic body 110 is reduced, the fluidity is increased, and the        vaporization medium may flow to the vicinity of the heating body        10 more quickly, and be heated and vaporized by the heating        member 120 more quickly. Therefore, through cooperation between        the preheating member 112 and the heating member 120, the        heating body 10 causes the vaporization medium to guide liquid        smoothly in the porous ceramic body 110, and problems such as        slow formation of the aerosol and dry heating of the heating        body 10 are not prone to occur, which improves a user        experience. It is verified that, the heating body 10 has a        particular effect on improving the vaporization medium with        relatively high viscosity.    -   (2) Because of selectivity of a radiation wavelength of infrared        heating, the heating body 10 may be designed for the effective        components in the vaporization medium, so as to implement        precise vaporization and increase an effective vaporization        concentration. In addition, because infrared rays of a specific        wavelength resonate with the effective components of the        vaporization medium, the vaporization medium is heated, which        has a higher thermal efficiency than heating with a heating wire        separately, and may significantly reduce energy consumption.    -   (3) Due to heating uniformity of infrared heating, problems such        as an excessively high local temperature caused by uneven        heating circuits and a burnt flavor caused by dry heating of the        vaporization medium may be avoided, and the taste may be        improved.

Because the vaporizer includes the heating body 10, an aerosol isquickly formed, and is not prone to dry heating, and energy is saved. Inaddition, an implementation of this application further provides anelectronic device. The electronic device includes a power supply and thevaporizer, and the power supply is electrically connected to thevaporizer to supply power to the vaporizer. More specifically, theelectronic device is an electronic vaporizer.

In addition, referring to FIG. 4 , an implementation of this applicationfurther provides a method for preparing the heating body, including thefollowing steps:

Step S10: Integrally form, according to a preset shape, a raw materialconfigured to prepare the porous ceramic body sand the heating member toprepare a green body.

Specifically, the raw material configured to prepare the porous ceramicbody includes a raw material configured to prepare the substrate and araw material configured to prepare the preheating member.

The raw material configured to prepare the substrate includes ceramicpowder, sintering auxiliary agent, and pore-forming agent. Specifically,types of the ceramic powder, the pore-forming agent, and the sinteringauxiliary agent are not particularly limited, and the ceramic powder,the pore-forming agent, and the sintering auxiliary agent commonly usedin the art may be used. For example, the ceramic powder may use adiatomite system or a zeolite system. It should be noted that, “ceramicpowder” refers to a powdered material obtained by fully and uniformlymixing and roasting the raw material (excluding the sintering auxiliaryagent and the pore-forming agent) used in the preparation of a ceramic.

In an embodiment, in parts by mass, the raw material configured toprepare the substrate includes 40 to 70 parts of ceramic powder, 5 to 30parts of sintering auxiliary agent, and 10 to 30 parts of pore-formingagent. In some other embodiments, in parts by mass, the raw materialconfigured to prepare the substrate includes 45 to 70 parts of ceramicpowder, 10 to 30 parts of sintering auxiliary agent, and 15 to 30 partsof pore-forming agent. Certainly, in another embodiment, types andcontents of components of the raw material configured to prepare thesubstrate are not limited to the above, and may further be adjustedaccording to an actual situation.

The raw material configured to prepare the preheating member includesthe ceramic powder, the sintering auxiliary agent, and the pore-formingagent, where the ceramic powder includes far infrared ceramic powder.The far infrared ceramic powder refers to ceramic powder with farinfrared radiation performance. The far infrared ceramic powder includesat least one of far infrared ceramic powder with a spinel or inversespinel ferrite structure, or high-performance infrared ceramic powderprepared by mixing and sintering a transition metal oxide and acordierite system silicate material. In some embodiments, the farinfrared ceramic powder with the spinel or inverse spinel ferritestructure is far infrared ceramic powder with a spinel or inverse spinelferrite structure including a transition metal oxide (such as NiO,Cr₂O₃, TiO₂, MnO₂, CuO, CoO, Fe₂O₃, ZnO, or the like).

In an embodiment, in parts by mass, the raw material configured toprepare the preheating member includes 40 to 80 parts of ceramic powder,5 to 30 parts of sintering auxiliary agent, and 10 to 30 parts ofpore-forming agent, where the ceramic powder is the far infrared ceramicpowder. In some other embodiments, in parts by mass, the raw materialconfigured to prepare the preheating member includes 50 to 80 parts offar infrared ceramic powder, 10 to 30 parts of sintering auxiliaryagent, and 15 to 30 parts of pore-forming agent, where the ceramicpowder is the far infrared ceramic powder.

In some other embodiments, the raw material configured to prepare thepreheating member includes the far infrared ceramic powder and theordinary ceramic powder. That is, the ceramic powder in the raw materialconfigured to prepare the preheating member includes the far infraredceramic powder, the ordinary ceramic powder, the sintering auxiliaryagent, and the pore-forming agent. In a specific example, in parts bymass, the raw material configured to prepare the preheating memberincludes 40 to 80 parts of ceramic powder, 5 to 30 parts of sinteringauxiliary agent, and 10 to 30 parts of pore-forming agent, where theceramic powder includes the far infrared ceramic powder and the ordinaryceramic powder. In some other embodiments, in parts by mass, the rawmaterial configured to prepare the preheating member includes 45 to 70parts of far infrared ceramic powder, 10 to 30 parts of sinteringauxiliary agent, and 15 to 30 parts of pore-forming agent, where theceramic powder includes the far infrared ceramic powder and the ordinaryceramic powder. Certainly, in another embodiment, types and contents ofcomponents of the raw material configured to prepare the preheatingmember are not limited to the above, and may further be adjustedaccording to an actual situation.

In an embodiment, the heating member includes a heating portion and aninfrared heating layer located on the heating portion.

A material of the heating portion is not particularly limited, and maybe selected according to a resistance value of a heating member thatneeds to be prepared.

A material configured to prepare an infrared heating layer includes thefar infrared ceramic powder, a binder, and a solvent. The far infraredceramic powder may be the same as the far infrared ceramic powder usedin the preheating member, and may also be different from the farinfrared powder used in the preheating member. The binder is selectedfrom at least one of an inorganic binder or an organic binder.Specifically, the inorganic binder is selected from at least one ofaluminum sol or sodium silicate. The organic binder is selected from atleast one of Carboxymethyl Cellulose (CMC), acrylic polymer, polyvinylalcohol (PVA), or dextrin. Certainly, the binder is not limited to theabove, and may further be other substances that may be used as thebinder.

In an embodiment, a step of preparing the heating member with theinfrared heating layer includes: preparing a material configured toprepare the infrared heating layer into a slurry; and the slurry issprayed on the heating wire by using a spraying process (for example,ion spraying, a spraying gun, or the like), and is then formed,degummed, and sintered, to prepare a heating body. It may be understoodthat, after being sintered first, the heating member may be formedtogether with the raw material configured to prepare the porous ceramicbody, be degummed, and be sintered, to prepare the heating body. Theformed heating member (a green body of the heating member) may also beformed again together with the raw material configured to prepare theporous ceramic body, and then be degummed and sintered, to prepare theheating body.

It should be noted that, a problem of shrinkage matching between thepreheating member and the substrate after sintering may be resolved byadjusting a mass ratio of the sintering auxiliary agent, thepore-forming agent, and skeleton-forming agent.

In an embodiment, a molding manner in a process of preparing the greenbody is one of injection molding, gel injection molding, or dry pressingmolding. Certainly, the molding manner in the process of preparing thegreen body is not limited to the above, and another manner may furtherbe used.

Step S402: Sinter the green body after degumming to prepare a heatingbody.

Specifically, a temperature for degumming ranges from 350° C. to 700°C.; and a temperature for sintering ranges from 800° C. to 1200° C. Insome other embodiments, a temperature for degumming ranges from 450° C.to 650° C.; and a temperature for sintering ranges from 750° C. to 1100°C. Certainly, in another embodiment, the temperature for degumming andthe temperature for sintering are not limited to the above, and thetemperature for degumming and the temperature for sintering may beadjusted according to the prepared porous ceramic body.

The preparation method for the heating body is simple and convenient,and the prepared heating body has a preheating function, and has a goodliquid guiding effect. Especially for liquid with relatively highviscosity, problems such as poor liquid guiding and dry heating of theheating body are not prone to occur. In addition, a preparation methodfor the heating body is simple and convenient, and is easy forindustrial production.

The technical features in the foregoing embodiments may be randomlycombined. For concise description, not all possible combinations of thetechnical features in the embodiments are described. However, as long ascombinations of the technical features do not conflict with each other,the combinations of the technical features are considered as fallingwithin the scope described in this specification.

While the invention has been illustrated and described in detail in thedrawings and foregoing description, such illustration and descriptionare to be considered illustrative or exemplary and not restrictive. Itwill be understood that changes and modifications may be made by thoseof ordinary skill within the scope of the following claims. Inparticular, the present invention covers further embodiments with anycombination of features from different embodiments described above andbelow. Additionally, statements made herein characterizing the inventionrefer to an embodiment of the invention and not necessarily allembodiments.

The terms used in the claims should be construed to have the broadestreasonable interpretation consistent with the foregoing description. Forexample, the use of the article “a” or “the” in introducing an elementshould not be interpreted as being exclusive of a plurality of elements.Likewise, the recitation of “or” should be interpreted as beinginclusive, such that the recitation of “A or B” is not exclusive of “Aand B,” unless it is clear from the context or the foregoing descriptionthat only one of A and B is intended. Further, the recitation of “atleast one of A, B and C” should be interpreted as one or more of a groupof elements consisting of A, B and C, and should not be interpreted asrequiring at least one of each of the listed elements A, B and C,regardless of whether A, B and C are related as categories or otherwise.Moreover, the recitation of “A, B and/or C” or “at least one of A, B orC” should be interpreted as including any singular entity from thelisted elements, e.g., A, any subset from the listed elements, e.g., Aand B, or the entire list of elements A, B and C.

What is claimed is:
 1. A heating body, comprising: a porous ceramic bodycomprising a preheating member, the preheating member comprising aporous infrared ceramic structure; and a heating member located on theporous ceramic body, the heating member being configured to provide heatfor the preheating member and to vaporize preheated liquid.
 2. Theheating body of claim 1, wherein the porous ceramic body comprises asubstrate, wherein the preheating member is located on the substrate,wherein the substrate comprises a porous ceramic structure, and whereinthe heating member is completely located in the preheating member and isclose to the substrate, or is located at a junction of the substrate andthe preheating member.
 3. The heating body of claim 2, wherein thesubstrate comprises a hollow porous ceramic structure, wherein thepreheating member comprises a hollow porous infrared ceramic structure,and wherein the substrate and the preheating member are nested with eachother.
 4. The heating body of claim 3, wherein the preheating member issleeved on the substrate, and wherein the heating member is spirallydistributed on the substrate.
 5. The heating body of claim 4, whereinthe heating member comprises a heating portion and an infrared heatinglayer located on the heating portion.
 6. The heating body of claim 5,wherein a thickness of the infrared heating layer ranges from 20 μm to500 μm.
 7. The heating body of claim 3, wherein the substrate is in ashape of a hollow cylinder, wherein the preheating member is in a shapeof a hollow cylinder, wherein the preheating member is sleeved on thesubstrate, wherein an inner diameter of the substrate ranges from 1.5 mmto 3 mm, and wherein an outer diameter of the preheating member rangesfrom 2.5 mm to 9 mm.
 8. The heating body of claim 2, wherein a surfaceof the substrate close to the preheating member recesses to form a firstgroove, wherein a surface of the preheating member close to thesubstrate recesses to form a second groove corresponding to the firstgroove, wherein the first groove and the second groove form a heatingcavity, and wherein the heating member is accommodated in the heatingcavity.
 9. The heating body of claim 1, wherein a porosity of thepreheating member ranges from 30% to 80%.
 10. The heating body of claim1, wherein a median pore size of the preheating member ranges from 10 μmto 100 μm.
 11. The heating body of claim 1, wherein a radiationwavelength of the preheating member ranges from 5 μm to 20 μm.
 12. Theheating body of claim 1, wherein a preheating temperature of thepreheating member ranges from 40° C. to 90° C.
 13. The heating body ofclaim 1, wherein a resistance value of the heating member ranges from0.5Ω to 1.5 Ω.
 14. The heating body of claim 2, wherein a porosity ofthe substrate ranges from 30% to 80%.
 15. The heating body of claim 2,wherein a median pore size of the substrate ranges from 10 m to 100 μm.16. A method for preparing the heating body of claim 1, the methodcomprising: integrally forming, of a preset shape, the heating memberand a raw material configured to prepare the porous ceramic body toprepare a green body; and sintering the green body after degumming toprepare the heating body.
 17. A vaporizer, comprising: a liquid storagecavity configured to store liquid; and the heating body of claim 1, theheating body being configured to absorb the liquid in the liquid storagecavity and vaporize the liquid.
 18. An electronic device, comprising: apower supply; and the vaporizer of claim 17, wherein the power supply iselectrically connected to the vaporizer to supply power to thevaporizer.